What this motor actually delivers on the line
The 1FL2105-4AF11-1SB0 is a SIMOTICS S-1FL2 low-inertia servo in the 1FL2 family, sized for the SINAMICS S200 drive platform and built around a 400 V 3AC supply rail (cites:,). It is rated at 2 kW rated power (Pn) with a rated speed of 3000 rpm, a stall torque (M0) of 8 Nm, and a rated torque (Mn) of 6.6 Nm — the gap between M0 and Mn is the acceleration headroom the S200 uses to swing loads through quick index moves without tripping the current limit (cites:). The mechanical package is shaft-height 52 mm with a keyed shaft (tolerance N), a holding brake for vertical-axis and zero-hold stop duties, and an angular connector exit with the 21-bit absolute encoder option (cites:). IP65 with oil seal means the housing tolerates coolant spray and light oil mist typical of machine-tool and packaging-line cells — the seal is the wet-end barrier, not the connector thread, so a missing or hardened oil seal is the first thing to inspect on a returned unit (cites:).
Lifecycle, product class, and what that means for returns
Lifecycle is recorded as current, meaning the part is still in normal production ordering channels (cites:). The product is classed under 'products manufactured / produced to order, which cannot be reused or re-utilized or be returned against credit' — that is the standard build-to-order classification Siemens uses for configured servo motors, and it governs return policy before anything else (cites:). For a returns handler, the practical read is straightforward: warranty still covers manufacturing defect and encoder/insulation failure on first power-up, but a motor that has been commissioned, run under load, or shows installation damage (winding shorts tied to cabling, contaminated oil seal, brake wear from cycling beyond its rated life) sits outside credit eligibility. Keep the original Siemens packaging and the nameplate traceable to the PO line — that is how a return stays on the covered-fault path rather than the no-credit path (cites:).
Sourcing posture for the BOM line
The packaging footprint is 432.00 x 222.00 x 240.00 mm per unit, which matters for the panel-builder planning crating and dock handling on multi-axis cells (cites:,).